Audio signals is a privacy-preserved segmentation [1]}, [2]}, [3]}, [4]}, [5]}, [6]}.
Predicting depth maps and segmentations from audio signals have been proposed [1]}, [2]}.
These methods can generate images from invisible physical information and can be used to recognize human actions by analyzing segmentation images.
Although these methods can visualize sounding objects, detecting non-sounding objects are difficult.
From the human recognition standpoint, people who do not make sounds, such as not talking or walking, cannot be detected.
